Astonished! Bravo!
No possibility to make the same with Circle, Polygon... ?

Ps this follow is not possible because on the Trim there are some lines points / faces who become "under face" !
but cool script anyway!
here i must make some classic arcs on surface before Trim arcs / surface

with your script with Show Points and Rebuild for be more visible on the image (will be the same if increasing number of points and no Rebuild)

Hi Pilou, in the future I want to make Trim work with curves like that which may not be entirely on the surface but yes currently that kind of trim won't work or at least not very well.

For now you should probably only create sketches like that across smooth surface areas and not across a sharp corner like your box example.

- Michael

The future will be so cool! :)